Rotary valve.



G. P. B. HOYT.

ROTARY VALVE.

APPLIOATIOH "FILED JAN. 9, 1912.

1 ,09 ,340 Patented "Mar. 24, 1914 2 SHEETS-SHEET 1.

WITNESSES INVE/VTUR ATTORNEYS G. P. B. HOYT.

ROTARY VALVE.

APPLICATION PILED- JAN. 9, 1912.

ATTORNEYS rice.

GABRIEL PQB. HOYT, or new YORK, n. Y.

ROTARY VALVE.

Specification of Letters Patent. Pfl,hen ted M 24, 1914,

Application filed January 9, 1912. Serial No. 670,215.

preventbinding of the parts and to allow free. passage of the explosive mixture and the exhaust gases without danger'of leakage.

For thepurpose mentioned use is made of a cylindrical valve chamber having ports in its side and an opening in one end, a rotary valve fitting into the said chamber-and havinga port adapted to register with the said valve chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the said valve chamber and having ports opposite the said valve chamber ports, the said partition being split intermediate its ports.

A practical embodiment of the invention.

is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a cross section of the rotary valve as applied to a two-cylinder internal combustion engine; Fig. 2 is a perspective View of the rotary valve; Fig. 3 is a like view of the partition; Fig. 4 is a sectional side elevation of the same; Fig. 5 is a similar view of the valve; and Figs-6, 7 ,8 and 9 are sectional plan views of the rotary valve in different positions and as applied to the two cylinders of a four-cycle engine.

The improved rotary valve is applied to the upper ends ofthe cylinders A and A of a i-cycle engine, and in each of the cylinders A and A is mounted to reciprocate a piston B connectedby a pitman C witl i a crank arm D of the engine shaft E, 1t being understood that the crank arms D are ar ranged approximately opposite each other on the engine shaft E. The upper. or work ing ends of the cylinders A and A are connected with an inlet valve F and an exhaust valve G, of which the valve F serves to control the admission of the explosive mixture into the cylinders A and A, and the valve G serves to control the exhaust oi the products of combustion from the cylinders Axand A.

The valves F and G are alike in construction so 1that it suflices to describe but one in detai v Each of the valves F and Gris provided with a cylindrical valve casing I-I provided in its'side with ports H, H leading to the upper or working chambers of the cylinders A and A, and the bottom of each valve chamber H is provided with a central opening H ofwhich the opening H of the valve F is; connected with a source of gas supply while the opening H of the exhaust valve Gr leads to the outside for conducting the products of combustion to a suitable place of discharge. In the said valve chamber H is a cylindrical rotary valve I open at the top and bottom and provided on its upper end with a radial arm I extending inwardly and secured to the upper end of a valve stem J provided at its lower end with a bevel gear wheel J in mesh with a bevel gear wheel J secured on a shaft K provided with a gear wheel K in mesh with a gear wheel K secured on the engine shaft E. Thus when the engine is running a rotary motion is transmitted by the gearing just described to the valve stem J so as to rotate the same and with it the rotary valve I. The rotary valve I is provided in its side with a port I adapted to register with the'cylinder ports H, H and the said valve I has its inner surface eccentric to the outer surface thereof, and the port I is located at the thinnest part of the valve, and is provided at this thinnest portion with a split I, as plainlyindicated in the drawings Within the rotary valve I extends a cylindrical partition L having its outer and inner surfaces eccentric one relative to the other and both eccentricto the valve casing H. The partition L is provided with two ports L',L arranged opposite the cylinder ports I-I', H and the partition L is provided with a splitL intermediate the ports L, L", and this split L is at the thinnest portion of the partition L 'and is arranged intermediate the ports H, II.

When the engine is running the valve I of the admissionvalve F controls the admission of the explosive mixture to the cylinders A and A at the time the port I of the said valve registers with the correspond.-

, ing ports H and H of the cylinders A and A, in a like manner the valve I of the exhaust valve controls the exhaust of the products of combustion from the cylinders A and A at the time the port I of the said valve registers with the correspondingports of the cylinders A and A. When the partition L becomes heated it expands and closes owing to the split L and a simi- -lar action takes place when the valve '1 becomes heated. New, by r'eferenceto Figs. 6, 7, 8 and 9, it will be noticed that the thicker portion of the valve I is approximately intermediate the ports H and. H atv the time the valve port I isdiametrically opposite and the ports H, H are closed, and the pressure within the cylinder A or A exerted against the corresponding valve I of the admission valve F, or the exhaust valve G during both the compression and explosion strokes, is against the thick portions ofthe valve, and the valve is not liable to be shifted and effectively closes the ports H and H during thesaid compression and explosion strokes. On further rotation of the valve "I from the position 'shown in Fig. 6 the space between the partition L and the valve I increases at 'a po1nt between the ports H and H (see Figs. 7 and 8), so that'the valve is free to rotate without danger of binding and a free connection is made between'the port I andthe ports H and H a Thevalve I of the admission valve, F is in the position shown in Fig. 6 when the explosion takes place infthe cylinder A and compression in the cylinder A, and as the valve rotates in the direction of thearrow a it assumes the position shown in Fig. 7 during the exhaust stroke of the cylinder A and the explosion in cylinder A. The valve I next assumes the position shown in Fig. 8 during the suction in the cylinder A and exhaust in cylinder A, and, as shown in Fig. 9, the valve finally reaches the position durin the compression in the cylinder A and t e suction in the c lind'r A, after which the above-describe ope ation is repeated. The [valve I of the exhaust valve or A for the admission of the explosive mixture or-exhaust of the products of combustion.

.Each of the cylinders A and A is provided a distance from the working chamber with a port N leading to a primary exhaust valve 0 for an initial discharge of the'prodnets of combustion from the cylinder A or A at the time the piston B nears the end of its explosion stroke, as shown in Fig. 1. The primary exhaust valve 0 is provlded with a rotary valve '1 secured on the stem J of the exhaust valve G to open and close the port N at the proper time so that a primary-exhaust of the products of combustion takes place as above mentioned.

It is understood that by the arrangement described the valve I is free to expand or contract owing to its split I at the port I Without danger of binding in the valve casing H, and as the annular artition L is split it also is free to expan and contract relative to the valve I without binding the latter, and by arranging the eccentric surfaces of the valve I and partition L in the manner described leakage is prevented especially during the compression and explosion strokes of the pistons B in the cylinders A and A. Having thus described my invention, I I claim as new and desire to secureby Letters Patent 1. A rotary valve, comprising a valve chamber, a rotary split valve fitting into the said chamber, and an annular split partition fixed in thevalve chamber and surrounded by the said rotary split valve.

2. A rotary valve, comprising a cylindrical valve chamber having ports in its side and an opening in one end, a rotary valve fitting into the said chamber and having a port adapted to register With the said valve chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the said valve chamber and having ports opposite the said valve chamber ports, the saidv partition being split intermediate its ports.

3. A rotary valve, comprising a cylindrical valve chamber having ports in its side and an opening in one end, a rotary valve fitting into the said chamber and having a a port adapted to register with the said valve chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the 'said valve chamber and having ports opposite the said valve chamber ports, the said partition being split intermediate its ports, and the said partition having its 5 inner and outer surfaces eccentric one relative to the other.

4. A rotary valve, comprising a cylindrical valve chamber having ports in its side and an opening in one end, a rotary valve fitting into the said chamber and having a port adapted to register with the said valve chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the said valve chamber and having ports opposite the said valve chamber ports, the said partition being split intermediate its ports, and the said partition having its inner and outer surfaces eccentric one relative to the other and eccentric relative to the 1:.

said valve chamber and the said rotary'valve having its inner surface eccentric relative'tothe outer surface.

51A rotary valve comprising a cylindrical valve chamber having ports in its side .and :an opening inone end, a rotary valve fitting into the said chamber and having a port adapted to register with the said valve chamber ports, the said rotary valve being split at its port, and an annular. artition fixed in the said valve chamber an having ports opposite the said valve chamber ports, the said partition being split intermediate its ports, and the said partition having its inner and outer surfaces eccentric one relative to the other and eccentric relative to the said valve chamber, and the said rotary valve having its inner surface eccentric relative to the'outer surface, the'said rotary valve being thinnest at its port.

6.. A rotary valve,.c0mprising a cylindri cal valve chamber having ports in its side and an opening in one end, a rotary valve fitting into the said chamber and having a port adapted to register with the said valve fitting into the said chamber and having a we port adapted to register .with the said va chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the said valve chamber and having ports opposite the said valve chamber'ports, the said partition being split intermediate its ports, and the said partition having its inner and outer surfaces eccentric one relative to the the other and eccentricrelative to the said valve chamber, and the said rotary valve having its inner surface eccentrio relative to the outer surface, the said rotary valve being thinnest at its port and the said partition being thinnest intermediate its ports 8. A rotary valve, comprising a cylindrical valve chamber having ports in its side and an opening in one end, a rotary valve fitting int-o the said chamber and having a port adapted to register With'the said valve chamber ports, the said rotary valve being split at its port, and an annular partition fixed in the said valve chamber and having Y ports opposite the said valve chamber ports, the said partition being split intermediate its ports, the said partition being provided with an annular outwardly-extending flange forming a seatv for the said rotary valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses GABRIEL P. B. HOYT.

Witnesses:

Tnno. G. Hosrnn, PHILIBD. RoLLHAns. 

